Water-tube boiler.



Patented May 4, 1909.

CHARLES S. HOOPER, OF ERIE, PENNSYLVANIA.

WATER-TUBE BOILER.

Specification of Letters Patent.

Application filed. September 25, 1908.

Patented May 4, 1909.

Serial No. 454,752.

To all whom it may concern:

Be it known that I, CHARLES S. l'ioornn, a citizen of the United States, residing at l Erie, in the county of Erie and State of Penn- 1 sylvania, have invented certain new and useful Improvements in vJatenTube Boilers; and I do hereby declare the following to be a l full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accom panying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to water-tube boilers, and has for its object the improvements in mechanism for connecting the water-tube headers with the steam-drums of water-tube 1 boilers, whereby the excess of expansion of the tubes over that of the steam-drum is provided for, and the injurious efl'ects thereof, so common in watentube boilers of this type, as ordinarily constructed, are entirely overcome.

The features of my invention are hereinafter fully set forth and described, and ill ustrated in the accompanying drawings in which:

Figure 1 is a view partially in elevation and partially in section, of a portion of a Water-tube boiler embodying my invention. Fig. 2 is an end view of a steam-drum and part of the header connection. Fig. 3 is a transverse central section of the same. Fig. 4 is a plan view of a collar embodying my invention. Fig. 5 is a side view in elevation of a modified construction of my improved collar. Fig. 6 is a transverse central section of the same. Fig. 7 is a plan view of the same.

In these drawings A represents the steamdrum, B the water-tubes, and C C the watertube headers, of a water-tube boiler. The collars D D are provided with flanges D through which rivets cl pass to secure the collars to the steam-drum A. Between the flanges D and the downwardly projecting central sleeve D on said collars, I make one or more corrugations d preferably extending entirely around or surrounding the central opening 1 in the sleeve D as is clearly shown in Fig. 4, so that when the sleeve D is riveted to the upper end of the tube E, secured to the headers C (I, the corrugations d operate to allow the collar D to bend slightly at that point, and thereby compensate for the different degrees of expansion of the water-tubes B and the steam-drum A, without straining any of the rivet joints of the connections E E. It is obvious that I can use my improved collar either at one or both ends of the steamdrum, as may be desired.

In Figs. 5, 6 and 7, I show a modified construction D of my improved collar. In this construction I make one or more straight corrugations d at each side of the central opening (1 in the sleeve D' as is clearly shown in said figures. It will readily be seen that this form of corrugation will produce very similar if not the same results, as the form of corrugation hereinbefore described. These collars are constructed by pressing the same out of a suitable sheet of metal in suitable dies, as is now the common practice in the construction of parts of steam boilers.

Having thus described my invention so as to enable others to construct and utilize the same, what I claim as new and desire to secure by Letters-Patent of the United States 1. A steam-drum collar, having corrugations between the flange thereon and the central opening therein, substantially as set forth.

2. In a Water-tube boiler, a steam-drum collar, corrugations surrounding the central opening therein, substantially as set forth.

3. In a water-tube boiler, the combination of headers, water-tubes connecting said headers, a steam-drum, a collar on said steam-drum, a central sleeve on said collar, corrugations in said collar between the flange thereon and the central opening therein, and tubes connecting the sleeves on said collars with the water-tube headers, substantially as set forth.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES S. IIOOPER. Witnesses G. J. hIEAD, M L. DAVIS. 

